$(function () {
  //适配移动设备
  $(window).resize(function () { 
    let myWidth = $(window).width() / 15
    myWidth = Math.max(myWidth, 320/15);
    myWidth = Math.min(myWidth, 750/15);
    $('html').css('fontSize', myWidth + 'px');
  });
  $(window).trigger('resize');
})